Mineral oils: processes and products – Paraffin wax; treatment or recovery – Separation of paraffin from oil
Patent
1988-06-06
1989-04-11
Caldarola, Glenn
Mineral oils: processes and products
Paraffin wax; treatment or recovery
Separation of paraffin from oil
208 28, 208 33, 2041818, 204191, 204308, C10G 3302, B03C 500
Patent
active
048204005
ABSTRACT:
For removing haze from dewaxed hydrocarbon oil mixture boiling in the lubricating oil range which is hazy, the hazy oil mixture is filtered in the filtration stage (201) of a dewaxing plant which is concurrently filtering undewaxed hydrocarbon oil mixture boiling in the lubricating oil range. Prior to filtering, the hazy dewaxed oil mixture is subjected to pretreatment (in pretreatment stage 204) such as to promote removal of haze from the dewaxed oil mixture during filtering. This pretreatment is carried out independently of the undewaxed oil mixture and can involve dilution/chilling with an oil solvent (e.g. liquid propane) and/or introduction of free excess electric charge, for example by charge injection. As an alternative to the pretreatment, the temperature conditions under which filtration takes place may be low enough to promote wax crystallization. The filtration stage may comprise a rotary drum filter (213) in which the undewaxed oil mixture is introduced into the filter vat (10), whereas the pretreated dewaxed oil mixture is sprayed onto the wax cake formed on the rotary filter drum.
REFERENCES:
patent: 2031210 (1936-02-01), Dillon et al.
patent: 2109131 (1938-02-01), Fisher
patent: 2544307 (1951-03-01), Fourrier et al.
patent: 2612465 (1952-09-01), Kiersted, Jr. et al.
patent: 2612466 (1952-09-01), Kiersted, Jr. et al.
patent: 2726990 (1955-12-01), Baker
patent: 2754250 (1956-07-01), Shipman, Jr.
patent: 2772210 (1956-11-01), Read
patent: 3644195 (1972-02-01), Gudelis et al.
patent: 4145275 (1979-03-01), Hall et al.
patent: 4255777 (1981-03-01), Kelly
patent: 4581112 (1980-04-01), Mintz et al.
Ryan Douglas G.
Savory Rudolph R.
Trust Donald B.
Allocca Joseph J.
Caldarola Glenn
Exxon Research and Engineering Company
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